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Rule Fog Hunter

Fog Hunter Forecast for Tarn Hows, Lake District

Hawkshead, England, United Kingdom

Tarn Hows offers intimate water, mature trees and rounded fells, with paths, reeds and reflections creating compact compositions in mist or autumn color.

Currently

Real-time conditions
Fog Probability
67%
Dewpoint Spread0.2°C
Visibility406 (Fog)
Relative Humidity99%
Wind Speed2.0m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/London
fog weather icon
Next opportunity
Fog
Tarn Hows
Today · 02:00–04:00 · 2h window
High confidence
100%
🌫️Fog Probability100%
Dewpoint Spread: 0.3°C
Visibility: 797 (Fog)
Relative Humidity: 98%
Wind Speed: 1.9m/s (calm conditions)

How this forecast is evaluated

See which weather signals PhotoWeather uses to identify Fog Hunter conditions across Lake District. The requirements and hourly values below show how those signals apply at Tarn Hows.

Explore Fog Hunter conditions across Lake District →

Recorded match history

Completed PhotoWeather forecast matches recorded for this exact rule at Tarn Hows during the last 365 days.

Last 30 days
6
recorded matching windows · 80% average confidence
Last 90 days
40
recorded matching windows · 75% average confidence
Last 365 days
40
recorded matching windows · 75% average confidence
Most frequent recorded start hour

04:00 local time, shared by 10 of 39 matches recorded in the last 365 days.

Most represented month

June, with 21 of 39 matches recorded in the last 365 days.

These figures use completed PhotoWeather MatchEvent records from the previous 365 days only. They describe recorded forecast matches, not observations, climatological probability, or a guarantee of future conditions.

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95-hour requirements breakdown

When available, the detailed table below covers only the stated 95-hour horizon (typically 72–168 hours, depending on available hourly data). Opportunity records above span the next 14 days, so this table does not explain that entire 14-day period.

What passed or failed, hour by hour
4matching hours in the next 95 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/London
Fog Probability
≥ 75.0%
Sat, Jul 25
03:000%
04:000%
05:0055%
06:0055%
07:000%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:0077%
15:0077%
16:0069%
17:0044%
18:000%
19:000%
20:000%
21:000%
22:000%
23:000%
Sun, Jul 26
24:0055%
01:0060%
02:00100%
03:00100%
04:0068%
05:0058%
06:0037%
07:000%
08:0059%
09:0029%
10:0029%
11:0016%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:000%
23:000%
Mon, Jul 27
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:0069%
20:0067%
21:0067%
22:0069%
23:0069%
Tue, Jul 28
24:0069%
01:0069%
02:0069%
03:0069%
04:0068%
05:0068%
06:0067%
07:0066%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:000%
23:000%
Wed, Jul 29
24:000%
01:000%
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity).

What does Fog Probability mean?

Inputs that drive the score

This derived score summarizes multiple raw weather signals. The table below shows the supporting inputs hour by hour, so you can see what's pushing the score up or down.

Time
Europe/London
Clear Sky Probability (Ensemble)
%
Dew Point
°C
Rainfall
mm
Relative Humidity
%
Snowfall
cm
Solar Elevation
°
Temperature
°C
Total Precipitation
mm
Vapor Pressure Deficit
kPa
Visibility
m
Wind Gusts
m/s
Wind Speed
m/s
Sun, Jul 26 Sunrise 05:13 Sunset 21:22
03:00 ☾
0% 12°C 0.23mm 99% 0cm -13° 12°C 0.19mm 0.02kPa 406m 2.6m/s 2m/s
04:00 ☾
0% 13°C 0.36mm 99% 0cm -8.5° 13°C 0.5mm 0.02kPa 203m 7.9m/s 2.3m/s
05:00 ☾
0% 13°C 0.54mm 97% 0cm -2.3° 14°C 1.3mm 0.05kPa 410m 11m/s 5.2m/s
06:00
0% 13°C 0.02mm 97% 0cm 5.1° 13°C 1.4mm 0.05kPa 368m 11m/s 4.6m/s
07:00
0% 12°C 0.02mm 97% 0cm 13° 13°C 1.5mm 0.05kPa 4039m 11m/s 4.8m/s
08:00
0% 12°C 0.01mm 97% 0cm 22° 13°C 0.06mm 0.05kPa 506m 11m/s 4.5m/s
09:00
0% 12°C 0.01mm 96% 0cm 30° 13°C 0.13mm 0.06kPa 1756m 11m/s 4.6m/s
10:00
0% 12°C 0mm 96% 0cm 39° 12°C 0.13mm 0.06kPa 10995m 11m/s 4.8m/s
11:00
0% 12°C 0mm 94% 0cm 46° 13°C 0.25mm 0.09kPa 15566m 11m/s 5.7m/s
12:00
0% 11°C 0mm 94% 0cm 52° 12°C 0.31mm 0.08kPa 24134m 13m/s 6.7m/s
13:00
0% 12°C 0mm 87% 0cm 55° 14°C 0.44mm 0.21kPa 24134m 13m/s 9.5m/s
14:00
4% 12°C 0mm 89% 0cm 54° 13°C 0.13mm 0.17kPa 24134m 13m/s 8.9m/s
15:00
7% 11°C 0mm 90% 0cm 50° 12°C 0.19mm 0.14kPa 24134m 13m/s 7.3m/s
16:00
11% 11°C 0mm 90% 0cm 43° 13°C 0.25mm 0.15kPa 24134m 13m/s 6.9m/s
17:00
17% 11°C 0mm 90% 0cm 36° 13°C 0.25mm 0.15kPa 24135m 12m/s 5.8m/s
18:00
22% 11°C 0mm 91% 0cm 27° 13°C 0.31mm 0.14kPa 24135m 12m/s 5.5m/s
19:00
28% 11°C 0mm 89% 0cm 18° 13°C 0.38mm 0.17kPa 24134m 11m/s 4.9m/s
20:00
45% 11°C 0mm 86% 0cm 9.9° 13°C 0.06mm 0.2kPa 24135m 11m/s 4.5m/s
21:00
63% 10°C 0mm 83% 0cm 2.2° 13°C 0.06mm 0.25kPa 24135m 10m/s 4.2m/s
22:00 ☾
80% 11°C 0mm 88% 0cm -5° 12°C 0.06mm 0.17kPa 24135m 8.3m/s 2.4m/s
23:00 ☾
80% 10°C 0mm 86% 0cm -11° 12°C 0.06mm 0.19kPa 24135m 7.2m/s 3m/s
Mon, Jul 27 Sunrise 05:13 Sunset 21:22
24:00 ☾
80% 10°C 0mm 90% 0cm -14° 12°C 0.13mm 0.14kPa 24135m 4m/s 1.9m/s
01:00 ☾
80% 9.8°C 0mm 88% 0cm -16° 12°C 0.13mm 0.17kPa 24135m 7.9m/s 3.1m/s
02:00 ☾
69% 10°C 0mm 91% 0cm -16° 12°C 0.06mm 0.13kPa 24135m 8.8m/s 2.5m/s
03:00 ☾
57% 9.5°C 0mm 85% 0cm -13° 12°C 0.06mm 0.2kPa 24135m 8.1m/s 3.5m/s
04:00 ☾
46% 9.9°C 0.02mm 90% 0cm -8.7° 11°C 0.13mm 0.13kPa 24134m 8.6m/s 2.4m/s
05:00 ☾
37% 9.7°C 0mm 89% 0cm -2.5° 11°C 0.19mm 0.14kPa 24135m 7.2m/s 2.3m/s
06:00
27% 9.8°C 0mm 91% 0cm 4.9° 11°C 0.19mm 0.12kPa 24134m 6m/s 1.9m/s
07:00
18% 9.7°C 0mm 89% 0cm 13° 11°C 0.25mm 0.14kPa 24135m 7.1m/s 2.1m/s
08:00
12% 9.5°C 0mm 87% 0cm 22° 12°C 0.06mm 0.18kPa 24134m 7.7m/s 2.3m/s
09:00
6% 9.3°C 0mm 82% 0cm 30° 12°C 0.06mm 0.26kPa 24135m 8m/s 3.1m/s
10:00
0% 9.2°C 0mm 80% 0cm 39° 13°C 0.13mm 0.3kPa 24135m 7.8m/s 3.1m/s
11:00
0% 10°C 0mm 80% 0cm 46° 13°C 0.19mm 0.3kPa 24134m 7.8m/s 4m/s
12:00
0% 11°C 0mm 80% 0cm 52° 14°C 0.25mm 0.33kPa 24134m 8.7m/s 6.4m/s
13:00
0% 11°C 0mm 77% 0cm 55° 15°C 0.31mm 0.38kPa 24135m 8.5m/s 6.5m/s
14:00
2% 11°C 0mm 74% 0cm 54° 16°C 0.06mm 0.46kPa 24134m 8.3m/s 6.3m/s
15:00
4% 11°C 0.01mm 79% 0cm 50° 15°C 0.06mm 0.36kPa 24135m 6.9m/s 3.7m/s
16:00
6% 12°C 0.06mm 86% 0cm 43° 14°C 0.13mm 0.21kPa 23896m 7.6m/s 2.6m/s
17:00
5% 12°C 0.01mm 93% 0cm 35° 13°C 0.19mm 0.1kPa 9848m 7.4m/s 2.5m/s
18:00
4% 13°C 0.24mm 97% 0cm 27° 13°C 0.25mm 0.04kPa 223m 4.3m/s 2.3m/s
19:00
3% 13°C 0.03mm 99% 0cm 18° 13°C 0.69mm 0.02kPa 196m 3m/s 2m/s
20:00
4% 13°C 0.07mm 99% 0cm 9.7° 13°C 0.06mm 0.02kPa 136m 3.4m/s 1.9m/s
21:00
4% 13°C 0.01mm 99% 0cm 2° 13°C 0.06mm 0.02kPa 102m 2.3m/s 1.8m/s
22:00 ☾
5% 14°C 0.03mm 99% 0cm -5.2° 14°C 0.06mm 0.01kPa 80m 2.4m/s 2m/s
23:00 ☾
3% 14°C 0.18mm 99% 0cm -11° 14°C 0.25mm 0.01kPa 83m 2.7m/s 2m/s
Tue, Jul 28 Sunrise 05:15 Sunset 21:20
24:00 ☾
2% 14°C 0.02mm 99% 0cm -15° 14°C 0.25mm 0.01kPa 81m 2.3m/s 1.9m/s
01:00 ☾
0% 14°C 0.05mm 99% 0cm -16° 15°C 0.38mm 0.01kPa 83m 2.4m/s 1.8m/s
02:00 ☾
0% 15°C 0.02mm 99% 0cm -16° 15°C 0.06mm 0.01kPa 82m 2.4m/s 1.9m/s
03:00 ☾
0% 15°C 0mm 99% 0cm -13° 15°C 0.06mm 0.01kPa 76m 2.4m/s 1.9m/s
04:00 ☾
0% 15°C 0mm 99% 0cm -8.9° 15°C 0.06mm 0.01kPa 71m 2.9m/s 2.2m/s
05:00 ☾
0% 15°C 0mm 99% 0cm -2.7° 15°C 0.06mm 0.01kPa 66m 2.9m/s 2.2m/s
06:00
0% 15°C 0.01mm 99% 0cm 4.7° 15°C 0.06mm 0.01kPa 65m 3.8m/s 2.4m/s
07:00
0% 15°C 0.11mm 99% 0cm 13° 15°C 0.13mm 0.01kPa 71m 5.8m/s 2.6m/s
08:00
0% 15°C 0.02mm 99% 0cm 21° 15°C 0.06mm 0.01kPa 86m 8m/s 2.5m/s
09:00
0% 15°C 0mm 99% 0cm 30° 16°C 0.13mm 0.01kPa 93m 6.9m/s 2.5m/s
10:00
0% 16°C 0.01mm 99% 0cm 38° 16°C 0.13mm 0.02kPa 126m 5.3m/s 2.7m/s
11:00
0% 16°C 0.01mm 99% 0cm 46° 16°C 0.13mm 0.02kPa 223m 6.3m/s 3.2m/s
12:00
0% 16°C 0mm 96% 0cm 52° 17°C 0.31mm 0.07kPa 2794m 9.9m/s 3.4m/s
13:00
0% 16°C 0mm 86% 0cm 54° 18°C 0.63mm 0.3kPa 22425m 8.9m/s 4.1m/s
14:00
1% 15°C 0mm 89% 0cm 54° 17°C 0.42mm 0.22kPa 22995m 6.6m/s 3.4m/s
15:00
1% 15°C 0mm 92% 0cm 50° 16°C 0.21mm 0.15kPa 23565m 4.2m/s 2.7m/s
16:00
2% 14°C 0mm 95% 0cm 43° 15°C 0mm 0.09kPa 24135m 1.9m/s 2m/s
17:00
2% 13°C 0mm 94% 0cm 35° 14°C 0mm 0.1kPa 24135m 2.2m/s 2.2m/s
18:00
3% 13°C 0mm 93% 0cm 27° 14°C 0mm 0.12kPa 24135m 2.4m/s 2.3m/s
19:00
3% 13°C 0mm 92% 0cm 18° 14°C 0mm 0.13kPa 24135m 2.6m/s 2.4m/s
20:00
5% 12°C 0mm 91% 0cm 9.5° 14°C 0mm 0.14kPa 24135m 2.5m/s 2.4m/s
21:00
7% 12°C 0mm 91% 0cm 1.8° 14°C 0mm 0.15kPa 24135m 2.3m/s 2.3m/s
22:00 ☾
9% 12°C 0mm 90% 0cm -5.4° 14°C 0mm 0.16kPa 24135m 2.1m/s 2.2m/s
23:00 ☾
7% 13°C 0mm 90% 0cm -11° 14°C 0mm 0.17kPa 24135m 2.4m/s 2.1m/s
Wed, Jul 29 Sunrise 05:17 Sunset 21:18
24:00 ☾
5% 13°C 0mm 89% 0cm -15° 15°C 0mm 0.19kPa 24135m 2.7m/s 2.1m/s
01:00 ☾
3% 14°C 0mm 88% 0cm -17° 15°C 0mm 0.2kPa 24135m 3m/s 2m/s
02:00 ☾
3% 14°C 0mm 83% 0cm -16° 17°C 0mm 0.33kPa 24135m 3.4m/s 2.3m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

How this forecast is made

Opportunities are threshold-based signals: PhotoWeather checks whether forecast conditions match the rules for a photography scenario. They are planning guidance, not guarantees. Forecasts can change as new model runs arrive, and confidence generally decreases farther into the forecast horizon, so recheck conditions before travelling.

The weather forecast foundation comes through Open-Meteo , which aggregates models from weather agencies. PhotoWeather applies condition-specific thresholds and derived calculations; not every condition uses every model or data input.

How opportunities work → Weather data sources →
Forecast generated

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